| package org.apache.samoa.moa.core; |
| |
| /* |
| * #%L |
| * SAMOA |
| * %% |
| * Copyright (C) 2014 - 2015 Apache Software Foundation |
| * %% |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * #L% |
| */ |
| |
| import java.text.DecimalFormat; |
| |
| /** |
| * Class implementing some string utility methods. |
| * |
| * @author Richard Kirkby (rkirkby@cs.waikato.ac.nz) |
| * @version $Revision: 7 $ |
| */ |
| public class StringUtils { |
| |
| public static final String newline = System.getProperty("line.separator"); |
| |
| public static String doubleToString(double value, int fractionDigits) { |
| return doubleToString(value, 0, fractionDigits); |
| } |
| |
| public static String doubleToString(double value, int minFractionDigits, |
| int maxFractionDigits) { |
| DecimalFormat numberFormat = new DecimalFormat(); |
| numberFormat.setMinimumFractionDigits(minFractionDigits); |
| numberFormat.setMaximumFractionDigits(maxFractionDigits); |
| return numberFormat.format(value); |
| } |
| |
| public static void appendNewline(StringBuilder out) { |
| out.append(newline); |
| } |
| |
| public static void appendIndent(StringBuilder out, int indent) { |
| for (int i = 0; i < indent; i++) { |
| out.append(' '); |
| } |
| } |
| |
| public static void appendIndented(StringBuilder out, int indent, String s) { |
| appendIndent(out, indent); |
| out.append(s); |
| } |
| |
| public static void appendNewlineIndented(StringBuilder out, int indent, |
| String s) { |
| appendNewline(out); |
| appendIndented(out, indent, s); |
| } |
| |
| public static String secondsToDHMSString(double seconds) { |
| if (seconds < 60) { |
| return doubleToString(seconds, 2, 2) + 's'; |
| } |
| long secs = (int) (seconds); |
| long mins = secs / 60; |
| long hours = mins / 60; |
| long days = hours / 24; |
| secs %= 60; |
| mins %= 60; |
| hours %= 24; |
| StringBuilder result = new StringBuilder(); |
| if (days > 0) { |
| result.append(days); |
| result.append('d'); |
| } |
| if ((hours > 0) || (days > 0)) { |
| result.append(hours); |
| result.append('h'); |
| } |
| if ((hours > 0) || (days > 0) || (mins > 0)) { |
| result.append(mins); |
| result.append('m'); |
| } |
| result.append(secs); |
| result.append('s'); |
| return result.toString(); |
| } |
| } |